Biology, 24.03.2020 13:55 birdman9416
Structura corpului unui peste
Answers: 2
Biology, 22.06.2019 13:00, mimivenga
Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?
Answers: 1
Biology, 22.06.2019 17:00, malachitorres813
What are ways that ordinary people can to keep antibiotic resistance from getting worse?
Answers: 1
Biology, 22.06.2019 18:30, maleja2038
12) several teeth were found in an area of flat land covered with trees and plants. the teeth were examined by a paleontologist, and it was determined that the teeth came from a shark. they found many other shark teeth in this area. however, the people who discovered the teeth were puzzled, because there was no source of water near where the fossils were found. what is the paleontologist's best explanation for why the teeth were found in this area? a) sharks used to live on flat land. b) this area was once covered with salt water. c) this area was once covered with freshwater. d) someone buried the shark teeth deep in the ground.
Answers: 1
Structura corpului unui peste...
History, 26.04.2020 08:20
Chemistry, 26.04.2020 08:20
Mathematics, 26.04.2020 08:20
Mathematics, 26.04.2020 08:20
Mathematics, 26.04.2020 08:20
English, 26.04.2020 08:20
Mathematics, 26.04.2020 08:20
Chemistry, 26.04.2020 08:20